Area Forecast Discussion
Issued by NWS Wilmington, NC

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000 FXUS62 KILM 011602 AFDILM AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON NC 1202 PM EDT TUE SEP 1 2015 .SYNOPSIS... A WEAK TROUGH OF LOW PRESSURE WILL LINGER OFF THE COAST THROUGH THURSDAY. HIGH PRESSURE WILL BUILD IN FROM THE NORTHEAST THIS WEEKEND WITH A FEW SHOWERS POSSIBLE. && .NEAR TERM /THROUGH TONIGHT/... AS OF 1100 AM TUESDAY...AN AREA OF STRATUS REACHING DOWN ALONG THE NC COAST TO THE TIP OF CAPE FEAR WAS BREAKING UP LEAVING A DECENT STRATOCU FIELD. THESE CLOUDS WILL CONTINUE TO BREAK UP LEAVING AN OTHERWISE SUNNY FORECAST THROUGH EARLY AFTN. A WEAK TROUGH OF LOW PRESSURE WILL EXTEND DOWN FROM LOW PRESSURE WELL OFF THE TIP OF CAPE HATTERAS THIS MORNING AND WILL LINGER OFFSHORE AS WEAK HIGH PRESSURE REMAINS OVER THE CAROLINAS. A RIDGE ALOFT WILL EXTEND UP THE SOUTHEAST COAST WITH A DEEPER W-NW FLOW OF DRIER AIR AS EVIDENT BY THE WATER VAPOR IMAGERY THIS MORNING WITH THE DEEP PLUME OF TROPICAL MOISTURE FROM YESTERDAY WELL OFFSHORE. SOME LINGERING LOW LEVEL MOISTURE SHOULD PRODUCE SOME AFTN CU..ESPECIALLY ALONG SEA BREEZE CONVERGENCE BOUNDARY. OVERALL EXPECT A FAIRLY QUIET AFTERNOON WITH A GOOD DEAL OF SUNSHINE..LEADING TO TEMPS BACK UP RIGHT AROUND NORMAL...MID TO UPPER 80S. LACK OF MOISTURE AND DEEP DRIER DOWNSLOPE FLOW WILL KEEP MOST SHWR ACTIVITY AT BAY BUT CANNOT COMPLETELY RULE OUT ISOLATED SHWR IN LOCALIZED CONVERGENCE. EXPECT A DRY NIGHT...BUT DEWPOINTS HOLDING UP AROUND 70 WITH SHALLOW MOISTURE LOCKED IN TONIGHT. OVERALL DO NOT EXPECT FOG BUT IF ANY SHWRS DEVELOP OR IN PLACES WITH SOME LINGERING MOISTURE...MAY SEE SOME SHALLOW FOG. EXPECT LOWS IN THE LOWER TO MID 70S...A BIT ABOVE NORMAL. && .SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... AS OF 315 AM TUESDAY...THE MID LEVEL PATTERN WILL TRANSITION FROM A WEAK WESTERLY FLOW TO A NORTHWEST FLOW BY FRIDAY MORNING. AT THE SURFACE A WEAK AND ELONGATED TROUGH WILL BE ESSENTIALLY STATIONARY ACROSS THE COASTAL CAROLINAS. CONSENSUS OF THE GUIDANCE SHOWS CONVECTION IS VERY LIMITED EVEN AT PEAK HEATING DUE PRIMARILY TO DRY AIR ALOFT. CONTINUES THE MINIMAL POPS THROUGHOUT. THE WEST TO NORTHWEST FLOW WILL KEEP A VERY WARM DOWNSLOPE IN PLACE WITH WIDESPREAD 90S BOTH DAYS. OVERNIGHT LOWS WILL BE IN THE LOWER TO MIDDLE 70S. && .LONG TERM /FRIDAY THROUGH MONDAY/... AS OF 315 AM TUESDAY...MEDIUM RANGE GUIDANCE SHOWS A SLOWLY EVOLVING MID LEVEL PATTERN THAT HAS RIDGING THROUGH THE MIDWEST INITIALLY WITH A CLOSED LOW DEVELOPING ACROSS THE SOUTHEAST LATE. THE SURFACE REFLECTIONS OF THIS PATTERN ARE MIXED IN STRENGTH AS WELL WITH A STURDY NORTHEAST PUSH OCCURRING LATE FRIDAY/SATURDAY AND WEDGE CONFIGURATION SETTING UP. THE MID LEVEL LOW HAS A WEAK REFLECTION WELL TO THE SOUTH. OVERALL THE EAST/NORTHEAST FLOW WILL KEEP SHOWERS IN THE PICTURE THROUGH THE PERIOD. WITH PLENTY OF EXPECTED CLOUD COVER...DAYTIME HIGHS WILL BE ON THE COOLER SIDE OF GUIDANCE WITH OVERNIGHT LOWS JUST THE OPPOSITE...JUST ABOVE GUIDANCE/CLIMATOLOGY. && .AVIATION /12Z TUESDAY THROUGH SATURDAY/... AS OF 12Z...11U-3.9 SATELLITE IMAGERY SHOWS FOG/STRATUS OVER THE NORTHEASTERN THIRD OF THE REGION. THIS FEATURE WILL HANG AROUND ABOUT AN TWO TO THREE HOURS AFTER SUNRISE AND WILL MIX OUT AFTER THAT. LBT AND ILM WILL BE THE MOST AFFECTED...LIKELY NOT AFFECTING FLO AND MYR...WITH CRE ON THE PERIPHERY. VERY LITTLE GRADIENT TODAY...WEAK NORTHERLY COMPONENT AT FIRST...BECOMING SOUTHEASTERLY IN THE AFTERNOON ALONG THE COAST. EXTENDED OUTLOOK...PREDOMINATELY VFR WITH BRIEF MORNING FOG AND ISOLATED/SCATTERED AFTERNOON CONVECTION. && .MARINE... NEAR TERM /THROUGH TONIGHT/... AS OF 1100 AM TUESDAY...WEAK PRESSURE PATTERN OVER THE WATERS WITH TROUGH LINGERING IN THE OFF SHORE WATERS TO THE WEST. THIS WILL LEAD TO LIGHT WINDS AND MANAGEABLE SEAS. WINDS WILL BE RIGHT AROUND 10 KTS OR LESS TODAY AND TONIGHT EXCEPT NEAR THE COAST THIS AFTERNOON WHERE THEY WILL BE ENHANCED BY THE SEA BREEZE CIRCULATION. SEAS WILL DECAY FROM PRESENT 3 FT RANGE TO RIGHT AROUND 2 FT LATER THIS MORNING. SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... AS OF 315 AM TUESDAY...RELATIVELY WEAK WIND FIELDS UNDER A POORLY DEFINED PRESSURE PATTERN WILL BE THE THEME FOR THE MARINE SHORT TERM FORECAST. EXPECT SOUTHEAST WINDS AROUND TEN KNOTS WEDNESDAY. MAY SEE SEVERAL HOURS OF OFFSHORE FLOW EARLY THURSDAY VIA A PASSING SHORTWAVE. BY THE AFTERNOON THE SEA BREEZE WILL TURN WINDS AROUND ONCE AGAIN TO SOUTHEAST. SEAS WILL REMAIN IN A LOW 1-3 FT RANGE. LONG TERM /FRIDAY THROUGH SATURDAY/... AS OF 315 AM TUESDAY...FRIDAY SHOULD SEE ONE MORE DAY OF WEAK WIND FIELDS WITH THE FLOW DICTATED BY THE SEA BREEZE...SOUTHEAST WINDS OF TEN KNOTS OR SO. BY SATURDAY A NORTHEAST PUSH WITH THE BEGINNINGS OF A LONG STANDING NORTHEAST FLOW DEVELOPS. WINDS SHOULD INCREASE IN MAGNITUDE TO 10-15 KNOTS. SIGNIFICANT SEAS WILL BE 1-3 FEET. && .ILM WATCHES/WARNINGS/ADVISORIES... SC...NONE. NC...NONE. MARINE...NONE. && $$ NEAR TERM...RGZ SHORT TERM...SHK LONG TERM...SHK AVIATION...DL

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